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Apple iPhone 6

Troubleshooting

If your device isn't working properly, you can try several solutions to solve the problem.
In most cases you can solve the problem by following these guidelines:

I can't make voice calls

Cause 3 of 7: There may be a temporary network problem

There may be a temporary network problem, which means that you can't make calls.

Solution: Try again later or when you're in a different area.